Gilson Pipetman Ultra U2 User Manual page 19

Tip-holder
(Lower)
Tip-holder
(Upper)
Piston holder
need to be treated in the same way (see "Cleaning
and Decontamination").
6) Lubricate the piston, see next page.
7 ) Reassemble the piston, spring and spring guide;
then carefully insert the assembly into the body
of the pipette. The spring guide should hold the
piston assembly inside the body of the pipette.
8) Reassemble the upper part of the tip-holder and
the connecting nut, then refi t to the body of the
pipette by rotating the connecting nut clockwise
until it is fi nger tight. Fit the O-ring (or for U2 and
U10, the seal) and reassemble the lower part of the
tip-holder. Refi t the tip ejector.
Spring guide-
The seals for U2 and U10 are fragile and can only be
used once. So, after unscrewing the lower part of the
tip-holder you must fi t a new seal.
Piston Spring (Tapered)
Take care to position the small-diameter
end of the spring as shown (innermost),
and that the fl anged end of the spring
guide is outermost.
Spring-small diameter end
Connecting Nut
fl anged end
Connecting Nut
Spring Guide
Spring guide-
fl anged end
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